JPH0675060A - Movement of timepiece - Google Patents

Abstract

PURPOSE: To obtain a movement having an inexpensively produced stem guide means. CONSTITUTION: This movement has a time display means H capable of imparting time data and at least one control member 34 composed of a stem and acting on the time display means H. The control means 34 is guided axially or rotationally by guide means. The movement further consists of three guide pieces 38, 40, 42 attached and held so as to hold the guide means between them and seat parts freely receiving the control members 34 are formed between the guide pieces.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The invention relates on the one hand to a shaft having a time display means formed by a gear train for transmitting time information, and on the other hand acting on this time display means. The movement of the timepiece having at least one control member (the main body portion of the timepiece mechanism excluding the exterior parts).

More particularly, the invention relates to a timepiece movement of the type mentioned above, which is provided with means adapted to guide the shaft.

[0003]

In known watch movements, the control shaft is generally guided by a free end located in a guide hole provided in the plate of the movement.

This guide hole is formed by a lateral hole directly drilled in the plate.

This drilling is expensive because it requires some processing operations and time consuming and machining which must be very precise.

[0006]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to overcome the drawbacks of the prior art by providing a movement with shaft guide means which is easy to manufacture and very inexpensive.

[0007]

According to the present invention, in order to solve the above-mentioned problems, there is provided a time display means capable of giving time information and at least one control member acting on the time display means. However, in a timepiece movement in which the control member is guided axially and / or rotationally via the guide means, the guide means are attached and held so as to be sandwiched between each other, and the control member is interposed therebetween. A timepiece movement is provided which is characterized in that it is constituted by three guide pieces forming a freely-acceptable seat.

[0008]

The features and advantages of the present invention will become apparent from the following detailed description, taken by way of example only, with reference to the accompanying drawings.

As shown in FIG. 1, the movement of the invention, generally designated M, carries a plate 1 and a time display means H capable of providing time information such as hours, minutes and in this embodiment seconds. It has a central bar 2 and a row bar 4.

The time display means H has a fixed number of gear trains consisting of a date back device 6, an intermediate second gear 8 and a dial one-row gear 10.

The date backing device 6 has a time cylinder 12 having a gear 14 which meshes with a dial single-row gear 10 directly mounted on a column 16 provided on the plate 1.

The sun back device 6 further has a tubular pinion 18,
The cannon pinion 18 carries the time cylinder 12, and is provided with a minute pinion 20 that meshes with the dial single-line gear 10 on one side and a minute gear 22 that meshes with the second intermediate shaft 8 on the other side.

The cannon pinion 18 is rotatably mounted on a fixed cannon 24, and the seat portion 26 of the cannon 24 is driven in the central bar 2.

The central bar 2 is therefore a fixed cannon 2.
The support of the time tubular body 12 and the tubular pinion 18 by 4 is ensured.

The day backing device 6 also comprises a second axis 28 which is supported by the central bar 2 by being rotatably positioned on a fixed cannon 24.

The second shaft 28 is further guided by the row bar 4 to which the second shaft 28 is rotatably mounted.

A second pinion 30 meshing with the second intermediate shaft 8 is driven on the second shaft 28, and a drive gear 32 is engaged with a motor means of a movement (not shown).

It can be seen that the second intermediate shaft 8 is guided by the row bar 4 and the plate 1 on which it is mounted for free rotation.

The movement M according to the invention further comprises a needle-turning shaft 34, which forms a control member adapted to act on the time indicating means H in a known manner.

Further, as is well known in the art of the needle-turning shaft 34, in this case, the dial single-row gear 10 acting as the needle-turning intermediate shaft is used.
A sliding pinion 36 is attached which can be meshed with. The needle-turning shaft 34 can be moved axially along the geometrical axis A and can rotate about this axis. The invention is not limited to this type of control member, but can be applied to control members that can only move or rotate in the axial direction.

The needle rotation shaft 34 is composed of the plate 1 and the central bar 2.
And a free end E guided by the row bar 4.

As can be seen in FIG. 2, the two parts 1 and 4
The central bar 2 forming the intermediate part between has an open groove 38 arranged along the geometrical control axis A, in which the free end E is located and movable. .

This groove 38 ensures lateral guidance of the free end E, which is further restricted on both sides by the row bar 4 and the plate 1.

For this purpose, the plate 1 and the row bar 4 each have bosses 40 and 42 which project into the groove 38.

The central bar 4 has three legs 44, 46 and 48.
It can be seen that it consists of a dish-shaped recessed part (Fig. 2).

The legs 44 and 46 rest directly on the central bar 2 and are fixedly held thereon, while the legs 48 rest directly on the plate 1 (not shown in FIG. 2).

It can be seen that the boss 42 is provided on the foot 44 near the locking position 50 which secures the row bar 4 to the central bar 2.

These bosses 40 and 42 are provided near the edges of the row bar 4 and plate 1, respectively.

The free end E of the shaft 34 is located and held between the row bar 4 and the plate 1, but also on the central bar 2 which is sandwiched between the row bar 4 and the plate 1. It is understood that they are retained.

The row bar 4, the center bar 2 and the plate 1 are
Mounted so as to be slidable relative to each other, the control member 34 and more particularly its free end E forms three guide portions between which form a seat for free reception.

More precisely by virtue of their action as bars or plates, these three guide parts 1, 2 and 4 also belong to at least one gear train 6, 8 belonging to the time display means H.
Or forming a support for 10 rotations.

The control member 3 is therefore inexpensive and does not require precision machining of the material or any extra processing operations.
It will be appreciated that four guiding means have been created.

[Brief description of drawings]

1 shows a part of a watch movement according to the invention, I in FIG.
It is sectional drawing along the -I line.

2 is a plan view along the arrow II in FIG. 1, showing only one row bar and one central bar of the movement according to the invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Plate 2 ... Center bar 4 ... Row bar 6 ... Day back device 8 ... Intermediate second gear 10 ... Dial 1 row gear 34 ... Needle turning shaft 38 ... Open groove M ... Movement H ... Time display means

Claims (6)

[Claims] 1. A time display means capable of providing time information, and at least one control member acting on the time display means, said control member moving axially and rotationally via a guide means. In a timepiece movement guided by at least one of the movements, said guide means comprises three guide pieces mounted and held so as to be held by one another, between which the control member is free. A watch movement characterized in that it forms a seat that can be received. 2. Movement according to claim 1, wherein the three guide pieces also form a support for the rotation of at least one gear train in the timepiece movement. 3. One of the three guide pieces forming an intermediate part mounted between the two other parts is arranged along the axis of the control member and guides the control member laterally. The movement according to claim 1, which has an open groove. 4. The movement according to claim 3, wherein the middle part is constituted by a central bar which ensures the support of the sun back device. 5. The three guide pieces include a row bar, a plate, and
The movement according to claim 1, which is constituted by a central bar held between a row bar and a plate. 6. The movement according to claim 3, wherein the plate and the row bar each have a boss that projects into the groove of the central bar.